CN206515400U - A kind of antenna rapid detection system based on code division - Google Patents
A kind of antenna rapid detection system based on code division Download PDFInfo
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- CN206515400U CN206515400U CN201720168519.XU CN201720168519U CN206515400U CN 206515400 U CN206515400 U CN 206515400U CN 201720168519 U CN201720168519 U CN 201720168519U CN 206515400 U CN206515400 U CN 206515400U
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Abstract
This application discloses a kind of antenna rapid detection system based on code division, antenna to be measured is phased array antenna；When antenna to be measured is as reception antenna, the antenna rapid detection system includes signal source, signal processing unit, multiple probes, antenna to be measured, receiver；Signal source produces initial signal；Initial signal is converted to one group of different transmission signal of coding characteristic by signal processing unit and is sent to the externally transmitting simultaneously of multiple probes respectively all the way；The coding information of this group of transmission signal is sent to receiver；The electromagnetic wave that multiple probes give off is after space propagation by antenna to be measured while receiving and being sent to receiver, received signal obtains the amplitude of wherein different coding characteristic signal after receiver is demodulated according to coding information.The application not only increases antenna measurement speed and testing efficiency, also with the accurate advantage of test result.
Description
Technical field
The application is related to a kind of test system of array antenna, and the near field failure of more particularly to phased array antenna is quickly examined
Survey or the debugging system of phased array antenna.
Background technology
Aerial array (antenna array) is the set of one group body antenna (individual antenna).These
Individual body antenna is used for launching and/or receiving radio wave, and they link together, and control their signal (such as electric current)
With specific amplitude (amplitude) and/or phase (phase) relation.The control signal interaction of out of phase so that
The signal of aerial array is reinforced in predetermined direction, is suppressed in non-predetermined direction.This causes aerial array to be normally used as list
Individual antenna is used has more preferable directional characteristic (directional characteristic) with treating, and than individual body antenna
With antenna gain (antenna gain).
Antenna array shows numerous species.If each body antenna in aerial array can be controlled individually, that is, phase
Control array antenna (Phased Array Antenna).In phased array antenna, the signal phase of each body antenna of control is designed
For --- the Net long wave radiation directional diagram (effective radiation pattern) of whole aerial array can be made in predetermined direction
It is reinforced, is suppressed in non-predetermined direction.Phase relation between the control signal of individual body antenna can be fixed, such as tower
Battle array (Tower array)；Can also be adjustable, such as wave beam control (Beam steering).Phased array antenna is wide
Broadcast, radar, space flight communication, meteorological survey, optics, radio frequency identification, be widely applied in terms of man-machine interface.
In field of radar, phased array antenna is generally divided into passively (passive, also referred to as passive) and actively (active is also referred to as
It is active) two kinds.During without special instruction, phased-array radar typically refers to passive phased-array radar.Passive phased-array radar is also referred to as
Passive Electronically Scanned Array (passive electronically scanned array, PESA), it only has a radio frequency source,
Radiofrequency signal is produced by the radio frequency source and is sent to each individual respectively after multiple phase shift modules (phase shift module)
The transmitter unit of antenna.Active Phase-Array Radar is also referred to as Active Electronically Scanned Array (active electronically
Scanned array, AESA), it is by substantial amounts of transceiver module (transmit/receive that it, which is launched with receive capabilities,
Module) realize.Each transceiver module includes emitter, receiver and antenna, and these transceiver modules composition array is just constituted
Active Phase-Array Radar.Different from passive phased-array radar, Active Phase-Array Radar is that each transceiver module is provided with solely
Vertical radio frequency source, each radio frequency source can produce the radiofrequency signal of independent (such as different frequency), these separate radio frequencies
Signal is sent to the emitter in each transceiver module respectively after multiple phase shift modules.
A key technology of the phased array antenna in R＆D process is exactly to test, and how to be completed rapidly and accurately phased
The test of array antenna is the emphasis in current phased array antenna R＆D process.The measuring technology of phased array antenna can be divided into far field
(far field) is tested and near field (near field) tests two kinds.Far field test is normally based on the method for testing in field, outside
Boundary's electromagnetic environment is complex, it is difficult to test accurate.The space that near-field test needs is small, and it is accurate and convenient and swift to test.In recent years
Come, near-field test has obtained using more and more.
The near-field test of phased array antenna is generally carried out in microwave dark room, and using one or more probes (probe).
The Chinese invention patent application that application publication number is CN103344847A, data of publication of application is on October 9th, 2013
A kind of near-field measurement method of phased array antenna is disclosed, phased array antenna is tested only with a probe.Application is public
The Chinese invention patent application that cloth number is CN103926474A, data of publication of application is on July 16th, 2014 also discloses that one kind has
The near-field measurement method of source phased array antenna, is also that phased array antenna is tested only with a probe.This single probe
Phased array antenna rapid detection system can complete test quickly for the less phased array antenna of electric size, but for electricity
Larger-size phased array antenna is accomplished by the testing time grown very much.Electric size therein refers to the physics chi of phased array antenna
The ratio between very little and operation wavelength.
Authorization Notice No. is that CN204595204U, authorized announcement date are in August, 2015 Chinese utility model patent of 26 days
A kind of testing scheme of transceiver module of Connectors for Active Phased Array Radar (T/R modules) is disclosed, using quantity identical with transceiver module
Multiple probes, and controlled respectively by the on-off circuit of identical quantity, for being carried out to each transceiver module of phased array antenna
Test.Carefully analyze after the cubicle switchboard configuration testing scheme, it can be found that it has following deficiency.First, AESA thunder
It is tens of at least up to the transceiver module quantity included, it is at most up to ten thousand.The program needs to set the spy of quantity identical with transceiver module
Head and on-off circuit, the scale of this test system are very huge and with high costs.Second, different Connectors for Active Phased Array Radar institutes
Comprising transceiver module quantity it is different, the program is not used to other different AESA thunders of transceiver module quantity
Reach, thus lack versatility.Third, the program is using switch switching mode, once a receipts are tested using only a probe
Module is sent out, so as to realize that the timesharing to a large amount of transceiver modules is tested, thus list is instead of with multi-probe switching time
The probe traveling time of probe, substantially increases test speed.But nonetheless, the testing time of massive phased array antenna is still
It is quite very long, generally require one month or even testing time of several months.
The Chinese invention patent application that application publication number is CN105259544A, data of publication of application is on January 20th, 2016
A kind of testing scheme of transceiver module of Connectors for Active Phased Array Radar (T/R components) is disclosed, test and excitation signal is given all
Phase shifter inside transceiver module, each transceiver module carries out orthogonal phase modulation, signal transacting respectively to test and excitation signal
Device completes the test to each transceiver module by quadrature phase demodulation again.Carefully analyze after the program, it can be found that its with
The application has substantial difference.The program is to enter the survey of line amplitude and phase for the transceiver module of Connectors for Active Phased Array Radar
Examination, test is the input of transceiver module and the signal stream exported, uses wire signal transmission means.What the application was related to
That phased array antenna is tested, test be Antenna aperture electric field induction, use transmission of wireless signals mode.
Utility model content
Technical problems to be solved in this application are to provide a kind of antenna for fault detect or amplitude calibration and quickly examined
Examining system, it is to avoid using switch switching mode, so that antenna measurement speed and testing efficiency are further improved, when shortening test
Between.
In order to solve the above technical problems, the antenna rapid detection system and its method of testing of the application are divided into two kinds of situations.
The first situation be antenna to be measured as reception antenna, second of situation is antenna to be measured as transmitting antenna.
When antenna to be measured is as reception antenna, antenna rapid detection system of the application based on code division include signal source,
Signal processing unit, multiple probes, antenna to be measured, receiver.Signal source produces initial signal.Initial signal passes through signal all the way
Processing unit is converted to one group of different transmission signal of coding characteristic and is sent to the externally transmitting simultaneously of multiple probes respectively；This group
The coding information of transmission signal is sent to receiver.Antenna to be measured is phased array antenna or reflector antenna.Multiple probes give off
Electromagnetic wave received simultaneously by antenna to be measured after space propagation and be sent to receiver, received signal is by receiver according to volume
The amplitude of wherein different coding characteristic signal is obtained after code information demodulation.
Further, when antenna to be measured is as reception antenna, the antenna rapid detection system also includes processing and calculated
Machine；Signal source produces initial signal；Initial signal is converted to one group of different hair of coding characteristic by signal processing unit all the way
Penetrate signal and be sent to the externally transmitting simultaneously of multiple probes respectively；The coding information of this group of transmission signal is sent to processing computer；
It is multiple pop one's head in the electromagnetic wave that gives off after space propagation by antenna to be measured while receiving and being sent to after receiver and be sent to processing again
Computer, received signal obtains the width of wherein different coding characteristic signal after processing computer is demodulated according to coding information
Degree.
Preferably, the multiple probe is arranged as straight line or two-dimensional array, straight line include in the horizontal direction row for a line or
It is that vertically row is a row, two-dimensional array includes any one of circle, circular arc, rectangular matrix.
Preferably, the multiple probe is deployed on moveable scanning support.
Further, the signal processing unit include AD conversion unit, it is allocation unit, multiple coding units, multiple
D/A conversion unit；Initial signal switchs to data signal by AD conversion unit by analog signal all the way, then single by distribution
Member copies as multi-path digital initial signal and is respectively supplied to each coding unit；Each railway digital initial signal is respectively through each
Individual coding unit carries out different coding and obtains one group of different transmission signal of coding characteristic；The coding of each transmission signal
Direct information receiver or processing computer；This group of transmission signal switchs to mould by multiple D/A conversion units by data signal
Intend signal.
Preferably, the quantity of the coding unit, the quantity of D/A conversion unit are identical with probe quantity.
Further, the signal source is omitted with signal processing unit, is changed to multiple signal sources；The multiple signal source production
Raw one group of coherent, the transmission signal that coding characteristic is different；This group of transmission signal is sent to multiple probes simultaneously to outgoing respectively
Penetrate；The coding information of this group of transmission signal is sent to receiver or processing computer.
When antenna to be measured is in receiving position, antenna rapid detection system and its method of testing of the application based on code division
Optimally only need using exclusive signal source and single pass receiver.Its method of testing is based on code division mode, with exhibition
Frequency means, which are constructed, encodes one group of different transmission signal, and this group of transmission signal can be received and by connecing by antenna to be measured simultaneously
Receipts machine and/or processing computer, which are demodulated, to be obtained different coding characteristic signal and detects amplitude, equivalent to respectively in each spy
Individually launch the combined situation that initial signal carries out multiple timesharing test in the position of head.The application is not only saved in existing scheme
Switching time thus improve test speed and testing efficiency, and because this group of transmission signal belongs to initial signal
Homogenous frequency signal thus test result it is accurate.
When antenna to be measured is as transmitting antenna, antenna rapid detection system of the application based on code division include signal source,
Antenna to be measured, multiple probes, receiver；Signal source produces transmission signal.Antenna to be measured is phased array antenna or reflector antenna.
Transmission signal is sent to antenna to be measured and externally launched.The electromagnetic wave that aerial radiation to be measured goes out is distinguished after space propagation by multiple probes
Receive simultaneously.Each probe received signal is sent to reception machine testing and obtains amplitude and/or phase respectively.
Preferably, multiple multiple ports of one receiver of connection or multiple receivers respectively of popping one's head in.
Preferably, the receiver is vector network analyzer.
When antenna to be measured is in transmitting position, antenna rapid detection system and its method of testing of the application based on code division
Need to use a receiver with multiplexer channel (i.e. multiple ports), or multiple single-channel receivers.Its test side
Method is detected while being and the multiple signals received to Multi probe are realized by the multiplexer channel of receiver.
Brief description of the drawings
Fig. 1 is the schematic diagram of test system embodiment one when antenna to be measured is reception antenna.
Fig. 2 is the corresponding method of testing flow chart of test system embodiment one when antenna to be measured is reception antenna.
Fig. 3 is the schematic diagram of 8 × 8 array antennas and 8 × 1 probe groups.
Fig. 4 is the schematic diagram of test system embodiment two when antenna to be measured is reception antenna.
Fig. 5 is the corresponding method of testing flow chart of test system embodiment two when antenna to be measured is reception antenna.
Fig. 6 is the schematic diagram of test system embodiment three when antenna to be measured is reception antenna.
Fig. 7 is the corresponding method of testing flow chart of test system embodiment three when antenna to be measured is reception antenna.
Fig. 8 is the schematic diagram of test system example IV when antenna to be measured is reception antenna.
Fig. 9 is test system example IV corresponding method of testing flow chart when antenna to be measured is reception antenna.
Figure 10 is the schematic diagram of test system when antenna to be measured is transmitting antenna.
Figure 11 is test system corresponding method of testing flow chart when antenna to be measured is transmitting antenna.
Embodiment
Referring to Fig. 1, when antenna to be measured is reception antenna, the reality of antenna rapid detection system of the application based on code division
Applying example one includes：
--- signal source, signal processing unit is connected by cable.The signal source is used to produce initial signal f0 and send
Toward signal processing unit.The initial signal f0 is, for example, to be produced by crystal oscillator (crystal oscillator) and optional
Ground is obtained by frequency transformation, initial signal f0 as whole antenna rapid detection system test frequency.
The signal source is also sent to whole antenna rapid detection system using the clock signal of itself as reference signal REF
Each part, unified time reference is provided for whole antenna rapid detection system.The reference signal REF is, for example,
10MHz。
--- signal processing unit, each is connected by cable and popped one's head in.It is defeated that the signal processing unit receives signal source institute
The initial signal f0 gone out, and initial signal f0 all the way is transformed to the different transmission signal ft1~ftN of one group of coding characteristic.This
One group of transmission signal ft1~ftN is sent to multiple probes respectively.Preferably, the quantity of transmission signal is identical with probe quantity.Together
When, coding information (including encryption algorithm, used coded sequence etc.) is also sent to receiver, coding letter by signal processing unit
Breath can for by each transmission signal decode (removing coding characteristic, be reduced to initial signal f0).
The encryption algorithm that the signal processing unit is used can use for reference CDMA (code division multiple
Access, CDMA) spread spectrum (spread spectrum are also referred to as spread) technology in technology, it can for example use orthogonal sequence
Arrange (orthogonal sequence, also referred to as orthogonal code, orthogonal code), pseudo-random sequence (pseudo-random
Sequence, also referred to as pseudo noise code, pseudo-random code), pseudo noise sequence (pseudo-noise sequence,
Claim pseudo-noise code, pseudo-noise code) initial signal f0 is modulated (modulation).Gold code (gold
Code it is exactly) a kind of common pseudo-noise code, available for realizing above-mentioned purpose.
--- multiple probes, for one group of transmission signal ft1~ftN being exported signal processing unit simultaneously to outgoing
Penetrate.Each different transmission signal of the coding characteristic for being exported signal processing unit of popping one's head in therein is simultaneously to outgoing
Penetrate.
The multiple probe is typically arranged in straight line, such as row is a line to multiple probes in the horizontal direction, or along vertical
Direction row is a row.Or, the multiple probe can also be arranged as the two-dimensional arrays such as circle, circular arc, rectangular matrix.
--- antenna to be measured, receiver is connected by cable.The antenna to be measured is phased comprising multiple body antennas
Array antenna, multiple (all or part of) individual body antennas therein be used for simultaneously receive it is multiple pop one's head in given off, in space
The electromagnetic wave of transmission, that is, antenna to be measured receives multiple probes simultaneously while one group of transmission signal ft1~ftN of transmitting, is treated
The reception signal fr of observation line is sent to receiver.
--- receiver, at least with receiving channel all the way (i.e. receiving port).The receiver is used only and received all the way
Passage treats the signal fr that receives that observation line exported and carries out the demodulation (demodulation) corresponding with coding information, so that
The amplitude of different coding characteristic signal is obtained, that is, has obtained the amplitude of each probe institute transmission signal, so as to judge to be used for
The reception characteristic of the multiple body antennas received.
If multiple probes launch identical frequency, the signal of identical coding simultaneously, these signals can be to be measured in space combination
Antenna can not just tell the launched signal of each probe and be detected.One group is formed after initial signal f0 is encoded
The different transmission signal ft1~ftN of coding is simultaneously launched simultaneously by multiple probes, even if these signals are due to encoding different frequency phase
With also will not in space combination, and antenna to be measured can also tell the launched signal of each probe and by receiver and/or
Manage computer and realize detection, and testing result is equal to multiple probes and launches initial signal f0 respectively and distinguished by antenna to be measured
The situation of reception.For example, the phased array antenna rapid detection system of the application launches one group of transmission signal using 8 probes simultaneously
Ft1~ft8, is equivalent to the position transmitting initial signal f0 using unique probe in probe one and is received by antenna to be measured, then will
The position transmitting initial signal f0 that unique probe is moved to probe two is received by antenna to be measured ... ..., then the movement that will uniquely pop one's head in
Position transmitting initial signal f0 to probe eight is received by antenna to be measured.
Preferably, the multiple probe is deployed on scanning support, and scanning support can be moved.It can be adjusted by motion scan frame
The position relationship between antenna to be measured and multiple probes is saved, so that the position of probe covers the whole near-field scan of antenna to be measured
Face.
Referring to Fig. 2, the corresponding method of testing of embodiment one of the antenna rapid detection system based on code division shown in Fig. 1
Comprise the following steps：
Step S201：Signal source produces initial signal f0 and is sent to signal processing unit.In addition, signal source also by itself
Clock signal is sent to each part of whole antenna rapid detection system as reference signal REF, is that whole antenna is quickly examined
Examining system provides unified time reference, at least including being sent to signal processing unit and receiver as clock signal.
Step S202：Initial signal f0 all the way is transformed to one group of different transmission signal of coding characteristic by signal processing unit
Ft1~ftN, and multiple probes are sent to respectively.Preferably, the quantity of transmission signal is identical with probe quantity.Signal processing unit
The coding information of each transmission signal is also sent to receiver, coding information can be special for each transmission signal is removed into coding
Levy and be reduced to initial signal f0.
Step S203：Multiple probes are respectively by one group of transmission signal ft1~ftN externally transmittings simultaneously.In other words, each
Probe is respectively by the externally transmitting simultaneously of the different transmission signal all the way of coding characteristic.
Step S204：Phased array antenna to be measured or reflector antenna are as reception antenna, while receiving multiple probe institutes
The electromagnetic wave of transmitting, i.e., receive multiple one group of launched transmission signal ft1~ftN that pop one's head in simultaneously, and received signal fr is sent
Toward receiver.
Step S205：The coding information that receiver is transmitted according to signal processing unit, from received signal fr carry out with
The corresponding demodulation of coding information, so as to obtain the amplitude of different coding characteristic signal, finally judges that the reception of antenna to be measured is special
Property.
Preferably, also include after step S205：Repeat step S201 uses different frequencies to step S205 and every time
The initial signal f0 of rate, thus and thus enters line frequency traverse scanning until completing the test of the whole frequency range of antenna to be measured.
Preferably, also include after step S205：Repeat step S201 to step S205 and each motion scan frame
Position.Alternatively it is deployed on scanning support, can be treated by motion scan frame with constantly regulate as multiple probes of transmitting terminal
Position relationship between observation line and multiple probes, until the position of probe covers the whole near-field scan face of antenna to be measured.
, can be with for example referring to Fig. 3, assuming antenna to be measured comprising 64 array elements (i.e. individual body antenna) and being arranged as 8 rows 8 and arrange
It is phased array antenna or reflector antenna.8 probes arranged as a row are fixed on scanning support.Assuming that the work frequency of antenna to be measured
Section is 18GHz~20GHz, and the scanning stepping of test frequency is 1GHz, then frequency traverse scanning and the whole near-field scan of covering
The test process in face is as follows.
18GHz is tested first, therefore initial signal f0 is set to 18GHz, and signal processing unit converts initial signal f0
For example it is respectively A, B, C, D, E, F, G, H for one group of 8 transmission signal ft1~ft8 coding characteristic.Arrange 8 probes for a row
Launch 8 transmission signal ft1~ft8 of this group respectively simultaneously, antenna to be measured receives these signals simultaneously and is transmitted to reception machine examination
Analysis is surveyed, it is possible thereby to judge reception characteristic of the antenna to be measured in 18GHz.19GHz, 20GHz are tested using the same manner.
Then motion scan frame, repeats above-mentioned test 18GHz, 19GHz, 20GHz process.For example set according to test frequency
Probe sampling interval is put, in this, as the mobile step value of scanning support.Continuous motion scan frame simultaneously repeats above-mentioned test process, with
Make row for one row 8 probe antenna to be measured between position relationships be continually changing, until probe position traveled through it is to be measured
The whole near-field scan face of antenna, so as to obtain antenna to be measured the connecing in each test frequency in the whole near-field scan face of probe covering
Receive characteristic.
Preferably, also include after step S205, treat observation line and carry out near field fault detect and/or near field amplitude school
It is accurate.Antenna to be measured includes multiple body antennas, and each body antenna has the ability for receiving signal.When the position of signal source
When constant, adjacent body antenna received signal should have close amplitude.If the reception signal of some body antenna
Amplitude is significantly different from the reception signal amplitude of adjacent body antenna, then can be determined that this body antenna breaks down, so that
Realize the quick diagnosis to individual antenna failure.If under multiple test condition, there is the reception signal amplitude of some body antenna
Theory deduction is not met with the reception signal amplitude of adjacent antenna and droop is presented, then may determine that connecing for this body antenna
Receipts result is inaccurate, and the deviation of the output electric signal of this body antenna can be reduced or eliminated by adjusting respective element.
Referring to Fig. 4, this is when antenna to be measured is reception antenna, antenna rapid detection system of the application based on code division
Embodiment two.The embodiment two adds processing computer on the basis of embodiment one, and signal processing unit be by
Coding information is sent to processing computer, and receiver is that the reception signal fr for being exported antenna to be measured is also directed to handle computer.
Collection of letters fr is docked by processing computer and carries out the demodulation corresponding with coding information, so as to obtain each probe institute transmission signal
Amplitude, finally judge the reception characteristic of antenna to be measured.
Referring to Fig. 5, this is the corresponding test of embodiment two of the antenna rapid detection system based on code division shown in Fig. 4
Method, comprises the following steps：
Step S501 is identical with step 201.
Coding information is sent to processing computer by step S502, signal processing unit, and remaining content is identical with step S202.
Step S503 is identical with step S203.
Step S504 is identical with step S204.
Step S505：Received signal fr is sent to processing computer by receiver.
Step S506：The coding information that processing computer is transmitted according to signal processing unit, enters from received signal fr
The row demodulation corresponding with coding information, so as to obtain the amplitude of different coding characteristic signal, finally judges connecing for antenna to be measured
Receive characteristic.
Embodiment two can also use with the identical frequency traverse scanning of embodiment one, the whole near-field scan face of probe covering,
The additional aspects such as near field fault detect and/or near field amplitude calibration.
Referring to Fig. 6, this is when antenna to be measured is reception antenna, antenna rapid detection system of the application based on code division
Embodiment three.Compared with embodiment one or embodiment two, one kind that embodiment three gives signal processing unit is implemented
Mode.The signal processing unit is specifically included：
--- analog-to-digital conversion (A/D) unit, digital initial signal f0 is converted to for initial signal f0 will to be simulated all the way, and
It is sent to allocation unit.
--- allocation unit, for a railway digital initial signal f0 to be copied as into multi-path digital process signal f0, and respectively
It is sent to each coding unit.
--- multiple coding units, each coding unit is used to a railway digital initial signal f0 carrying out mutually different compile
Exported after code.The different set of number transmission signal ft1~ftN of multiple coding unit difference output multi-channel coding characteristics,
This group of digitally transmitted signals ft1~ftN is sent to multiple D/A conversion units respectively.The coding is, for example, single by multiple codings
Member is entered to a railway digital initial signal f0 respectively using the one or more in orthogonal sequence, pseudo-random sequence, pseudo noise sequence
Row spread spectrum is modulated.The coding information of each transmission signal is also sent to receiver or processing computer by these coding units.
--- multiple digital-to-analogue conversion (D/A) units, each D/A conversion unit is used to change digitally transmitted signals all the way
For analog transmissions signal all the way.One group of different analog transmissions signal of multiple D/A conversion unit difference output multi-channel coding characteristics
Ft1~ftN, this group of analog transmissions signal ft1~ftN is sent to multiple probes respectively.
Preferably, the quantity of transmission signal, the quantity of coding unit, the quantity of D/A conversion unit with probe quantity phase
Together.
Surveyed referring to Fig. 7, the embodiment three of the phased array antenna rapid detection system based on code division shown in Fig. 6 is corresponding
Method for testing comprises the following steps：
Step S701：Signal source produces initial signal f0 and is sent to AD conversion unit.In addition, signal source also by itself
Clock signal is sent to each part of whole test system as reference signal REF, and unification is provided for whole test system
Time reference, at least including being sent to AD conversion unit, allocation unit, coding unit, D/A conversion unit and receiver conduct
Clock signal.
Step S702：AD conversion unit will simulate initial signal f0 all the way and be converted to a railway digital initial signal f0, and
It is sent to allocation unit.
Step S703：One railway digital initial signal f0 is copied as multi-path digital initial signal f0 by allocation unit, and respectively
It is supplied to each coding unit.
Step S704：Each coding unit carries out different coding to a railway digital initial signal, obtains one group
One in the different digitally transmitted signals ft1~ftN of coding characteristic, multiple coding units just export set of number transmission signal
Ft1~ftN is simultaneously sent to multiple D/A conversion units respectively.The coding information of each transmission signal is also sent to by these coding units
Receiver or processing computer.Preferably, the quantity of transmission signal, the quantity of coding unit, the quantity of D/A conversion unit are equal
It is identical with probe quantity.
Step S705：Each D/A conversion unit will be converted to analog transmissions signal all the way by digitally transmitted signals all the way, many
One group of different analog transmissions signal ft1~ftN of individual D/A conversion unit difference output multi-channel coding characteristic, this group simulation hair
Penetrate signal ft1~ftN and be sent to multiple probes respectively.
Here be step S706 to step S708, be respectively equivalent to step S203 to step S205, repeat no more.
Or, here be step S716 to step S719, be respectively equivalent to step S503 to step S506, repeat no more.
Embodiment three can also use with the identical frequency traverse scanning of embodiment one, the whole near-field scan face of probe covering,
The additional aspects such as near field fault detect and/or near field amplitude calibration.
Referring to Fig. 8, this is when antenna to be measured is reception antenna, antenna rapid detection system of the application based on code division
Example IV.Compared with embodiment one or embodiment two, example IV instead of in embodiment one only with multiple signal sources
One signal source and signal processing unit.
The multiple signal source connects multiple probes by cable.The multiple signal source is used to produce one group of coherent
(coherent) transmission signal ft1~ftN.Coherent refers between the signal that each signal source is produced there is the phase determined to close
System.This group of transmission signal ft1~ftN frequency is identical, but has different coding characteristics respectively, for example, can be compiled by multiple
The derived digital signal of journey is produced.This group of transmission signal ft1~ftN is sent to multiple probes respectively.Preferably, the number of transmission signal
Amount is identical with probe quantity.Meanwhile, the multiple signal source also by the coding information of each transmission signal (comprising encryption algorithm,
Used coded sequence etc.) receiver or processing computer are sent to, coding information can be for each transmission signal be decoded
(removing coding characteristic).
In addition, at least one signal source is also sent to whole test system using the clock signal of itself as reference signal REF
Each part, unified time reference is provided for whole test system.The reference signal REF is, for example, 10MHz.
Referring to Fig. 9, the corresponding method of testing of example IV of the antenna rapid detection system based on code division shown in Fig. 8
Comprise the following steps：
Step S901：Multiple signal sources produce transmission signal ft1~ftN of one group of coherent, and are sent to multiple probes respectively.
This group of transmission signal ft1~ftN frequency is identical but has different coding characteristics respectively.Preferably, the number of transmission signal
Amount is identical with probe quantity.The coding information of each transmission signal also is sent into receiver for the multiple signal source or processing is calculated
Machine, coding information can be for each transmission signal be decoded.
In addition, at least one signal source is also sent to whole test system using the clock signal of itself as reference signal REF
Each part, unified time reference is provided for whole test system, at least including being sent to receiver as clock signal.
Here be step S902 to step S904, be respectively equivalent to step S203 to step S205, repeat no more.
Or, here be step S912 to step S915, be respectively equivalent to step S503 to step S506, repeat no more.
Example IV can also use with the identical frequency traverse scanning of embodiment one, the whole near-field scan face of probe covering,
The additional aspects such as near field fault detect and/or near field amplitude calibration.
Compared with the phased array antenna rapid detection system of existing single probe, the antenna rapid detection system of the application is adopted
With Multi probe, antenna measurement speed and testing efficiency can be significantly increased, shortens the testing time.With existing multi-probe phase
Control array antenna rapid detection system is compared, and the application instead of switch switching mode in code division (code division) mode, by
In eliminating switching time, and multiple probes can be launched by antenna to be measured while receiving and by the list of receiver together
Passage and/or processing computer are tested and analyzed, and are further increased antenna measurement speed and testing efficiency, are shortened test
Time.
Referring to Fig. 10, when antenna to be measured is transmitting antenna, antenna rapid detection system bag of the application based on code division
Include：
--- signal source, antenna to be measured is connected by cable.The signal source is used to produce transmission signal fr and be sent to treat
Observation line.The transmission signal ft is, for example, to be produced by crystal oscillator and obtained by frequency transformation, and transmission signal ft makees
For the test frequency of whole antenna rapid detection system.
The signal source is also sent to whole antenna rapid detection system using the clock signal of itself as reference signal REF
Each part, unified time reference is provided for whole antenna rapid detection system.The reference signal REF is, for example,
10MHz。
--- antenna to be measured, to include the phased array antenna of multiple body antennas, for will all the way transmission signal ft it is external
Transmitting.
--- multiple probes, pass through cable connection receiver.It is multiple to pop one's head in for being sent out while receiving antenna to be measured respectively
The signal ft penetrated, multiple probe received signal fr1~frN are sent to each port of receiver or multiple receptions respectively
Machine.For example, probe quantity is less than or equal to the port number of receiver.
--- receiver, with multipath reception passage, or multiple receivers.These receiving channels are used to detect simultaneously
One group of reception signal fr1~frN amplitude and/or phase, so as to judge the emission characteristics of antenna to be measured.For example, conventional four
Port vector network analyzer has 8 road coherent receiving channels, is equivalent to be an independent single-pass per receiving channel all the way
Road receiver.Receiver with multiple receiving channels can also be changed to multiple single-channel receivers.
Preferably, the multiple probe is deployed on scanning support, and scanning support can be moved.It can be adjusted by motion scan frame
The position relationship between antenna to be measured and multiple probes is saved, so that the position of probe covers the whole near-field scan of antenna to be measured
Face.
Figure 11 is referred to, the corresponding method of testing bag of the phased array antenna rapid detection system based on frequency division shown in Figure 10
Include following steps：
Step S1101：Signal source produces transmission signal ft and is sent to antenna to be measured.In addition, signal source also by itself when
Clock signal is sent to each part of whole antenna rapid detection system as reference signal REF, is whole antenna quick detection
System provides unified time reference.
Step S1102：Antenna to be measured will externally be launched transmission signal ft all the way.
Step S1103：Multiple probes receive the transmission signal ft all the way that antenna to be measured is launched respectively simultaneously, each probe
Received signal fr1~frN is sent to receiver respectively respectively.
Step S1104：Receiver detects one group of reception signal fr1~frN amplitude and/or phase value simultaneously, so as to sentence
Surely it is used for the emission characteristics of antenna to be measured.
Antenna to be measured can be also used as during reception antenna days as antenna test method during transmitting antenna using antenna to be measured
The additional aspects such as each embodiment identical frequency traverse scanning, the whole near-field scan face of probe covering of wire testing method.
Preferably, also include after step S1104, the near-field test parameter of phased array antenna is realized by existing algorithm
With the conversion of far field test parameter, the information such as the antenna pattern of phased array antenna are obtained.For example, first being carried out for antenna to be measured
Each step of above-mentioned method of testing obtains amplitude and phase distribution of the antenna to be measured as transmitting antenna on near-field scan face, so
Afterwards according to the positional information of measurement data, the characteristic of probe and near-field scan face, Antenna Far Field is calculated by existing algorithm special
The full detail of property.Each step for being changed to re-start above-mentioned method of testing after standard gain antenna by antenna to be measured obtains standard
The full detail of the Antenna Far Field characteristic of gain antenna, nominal gain value calculates antenna to be measured according to known to standard gain antenna
Yield value, complete the gain test of antenna to be measured.
The preferred embodiment of the application is these are only, is not used to limit the application.Come for those skilled in the art
Say, the application there can be various modifications and variations.It is all any modifications within spirit herein and principle, made, equivalent
Replace, improve etc., it should be included within the protection domain of the application.
Claims (10)
1. a kind of antenna rapid detection system based on code division, it is characterized in that, antenna to be measured is phased array antenna；When antenna to be measured
During as reception antenna, the antenna rapid detection system include signal source, signal processing unit, multiple probes, antenna to be measured,
Receiver；Signal source produces initial signal；To be converted to one group of coding characteristic by signal processing unit different for initial signal all the way
Transmission signal and be sent to respectively it is multiple probe simultaneously externally transmitting；The coding information of this group of transmission signal is sent to receiver；
It is multiple pop one's head in the electromagnetic wave that gives off after space propagation by antenna to be measured while receiving and being sent to receiver, received signal is passed through
Cross the amplitude that wherein different coding characteristic signal is obtained after receiver is demodulated according to coding information.
2. the antenna rapid detection system according to claim 1 based on code division, it is characterized in that, when antenna to be measured is as connecing
When receiving antenna, the antenna rapid detection system also includes processing computer；Signal source produces initial signal；Initial signal all the way
One group of different transmission signal of coding characteristic is converted to by signal processing unit and is sent to multiple probes respectively simultaneously to outgoing
Penetrate；The coding information of this group of transmission signal is sent to processing computer；Multiple electromagnetic waves given off of popping one's head in are after space propagation
Received and be sent to after receiver and be sent to processing computer again simultaneously by antenna to be measured, received signal by processing computer according to
The amplitude of wherein different coding characteristic signal is obtained after coding information demodulation.
3. the antenna rapid detection system according to claim 1 or 2 based on code division, it is characterized in that, the multiple probe
Straight line or two-dimensional array are arranged as, straight line is a line including row in the horizontal direction or vertically row is a row, two-dimentional battle array
Row include any one of circle, circular arc, rectangular matrix.
4. the antenna rapid detection system according to claim 1 or 2 based on code division, it is characterized in that, the multiple probe
It is deployed on moveable scanning support.
5. the antenna rapid detection system according to claim 1 or 2 based on code division, it is characterized in that, the signal transacting
Unit includes AD conversion unit, allocation unit, multiple coding units, multiple D/A conversion units；Initial signal is passed through all the way
AD conversion unit switchs to data signal by analog signal, then copies as multi-path digital initial signal and difference by allocation unit
It is supplied to each coding unit；Each railway digital initial signal carries out different encode respectively through each coding unit
To the transmission signal that one group of coding characteristic is different；The coding information of each transmission signal is sent to receiver or processing computer；This
One group of transmission signal switchs to analog signal by multiple D/A conversion units by data signal.
6. the antenna rapid detection system according to claim 5 based on code division, it is characterized in that, the number of the coding unit
Amount, the quantity of D/A conversion unit are identical with probe quantity.
7. the antenna rapid detection system according to claim 1 or 2 based on code division, it is characterized in that, the signal source with
Signal processing unit is omitted, and is changed to multiple signal sources；
The multiple signal source produces one group of coherent, the transmission signal that coding characteristic is different；This group of transmission signal is sent respectively
Toward the externally transmitting simultaneously of multiple probes；The coding information of this group of transmission signal is sent to receiver or processing computer.
8. the antenna rapid detection system according to claim 1 or 2 based on code division, it is characterized in that, when antenna to be measured is made
During for transmitting antenna, the antenna rapid detection system includes signal source, antenna to be measured, multiple probes, receiver；Signal source is produced
Raw transmission signal；Transmission signal is sent to antenna to be measured and externally launched；The electromagnetic wave that aerial radiation to be measured goes out quilt after space propagation
Multiple probes are received respectively, and each probe received signal is sent to reception machine testing and obtains amplitude and/or phase respectively.
9. the antenna rapid detection system according to claim 8 based on code division, it is characterized in that, multiple probes are connected respectively
Multiple ports of one receiver or multiple receivers.
10. the antenna rapid detection system according to claim 8 based on code division, it is characterized in that, the receiver is arrow
Measure Network Analyzer.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872806A (en) * | 2017-02-23 | 2017-06-20 | 上海霍莱沃电子系统技术股份有限公司 | A kind of antenna rapid detection system and its method of testing based on code division |
| CN108390703A (en) * | 2018-01-25 | 2018-08-10 | 成都天锐星通科技有限公司 | A kind of multi-beam phased array antenna mechanism |
| CN112684394A (en) * | 2020-12-04 | 2021-04-20 | 威创集团股份有限公司 | Multi-probe time sequence calibration jig and calibration method |
| CN113671270A (en) * | 2021-07-21 | 2021-11-19 | 西安空间无线电技术研究所 | Antenna testing system and method based on digital switch |
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2017
- 2017-02-23 CN CN201720168519.XU patent/CN206515400U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872806A (en) * | 2017-02-23 | 2017-06-20 | 上海霍莱沃电子系统技术股份有限公司 | A kind of antenna rapid detection system and its method of testing based on code division |
| CN106872806B (en) * | 2017-02-23 | 2023-09-22 | 上海霍莱沃电子系统技术股份有限公司 | Antenna rapid detection system based on code division and test method thereof |
| CN108390703A (en) * | 2018-01-25 | 2018-08-10 | 成都天锐星通科技有限公司 | A kind of multi-beam phased array antenna mechanism |
| CN108390703B (en) * | 2018-01-25 | 2021-02-19 | 成都天锐星通科技有限公司 | Multi-beam phased array antenna mechanism |
| CN112684394A (en) * | 2020-12-04 | 2021-04-20 | 威创集团股份有限公司 | Multi-probe time sequence calibration jig and calibration method |
| CN113671270A (en) * | 2021-07-21 | 2021-11-19 | 西安空间无线电技术研究所 | Antenna testing system and method based on digital switch |
| CN113671270B (en) * | 2021-07-21 | 2024-06-11 | 西安空间无线电技术研究所 | Antenna test system and method based on digital switch |
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